html,
body {
    width: 100%;
    height: 100%;
}

* {
    margin: 0;
    padding: 0;
}

body {
    background-color: #020024;
}

.word {
    font-size: 22px;
    text-align: center;
    color: gold;
    padding-top: 50px;
    letter-spacing: 5px;
    text-shadow: 2px 4px 9px rgba(255, 255, 255, 0.7);
}

/*圣诞树外层div*/
.tree {
    width: 200px;
    height: 300px;
    margin: 80px auto 0 auto;
    /*开启相对定位*/
    position: relative;
    /* border: 1px solid #fff; */
}

.star {
    width: 50px;
    height: 50px;
    position: absolute;
    background-color: #fff;
    border-radius: 50%;
    top: -25px;
    z-index: 1000;
    /*  */
    left: 50%;
    /*  */
    transform: translateX(-50%);
    animation: starLight 1.5s ease infinite alternate;
}

.star-in {
    position: absolute;
    left: 50%;
    top: 50%;
    border-right: 100px solid transparent;
    border-bottom: 70px solid gold;
    border-left: 100px solid transparent;
    transform: translateX(-50%) translateY(-50%) rotate(35deg) scale(0.14);
}

.star-in:before {
    border-bottom: 80px solid gold;
    border-left: 30px solid transparent;
    border-right: 30px solid transparent;
    position: absolute;
    top: -45px;
    left: -65px;
    content: '';
    transform: rotate(-35deg);
}

.star-in:after {
    border-bottom: 70px solid gold;
    border-left: 100px solid transparent;
    border-right: 100px solid transparent;
    position: absolute;
    top: 3px;
    left: -105px;
    content: '';
    transform: rotate(-70deg);
}

@keyframes starLight {
    0% {
        background: radial-gradient(ellipse at center,
                gold 0%, rgba(255, 240, 158, 0.5) 42%,
                rgba(255, 242, 173, 0.2) 58%,
                rgba(255, 255, 255, 0.1) 100%);
    }

    25% {
        background: radial-gradient(ellipse at center,
                gold 0%, rgba(255, 240, 158, 0.5) 40%,
                rgba(255, 242, 173, 0.2) 60%,
                rgba(255, 255, 255, 0.1) 100%);
    }

    50% {
        background: radial-gradient(ellipse at center,
                gold 0%, rgba(255, 240, 158, 0.5) 38%,
                rgba(255, 242, 173, 0.2) 62%,
                rgba(255, 255, 255, 0.1) 100%);
    }

    75% {
        background: radial-gradient(ellipse at center,
                gold 0%, rgba(255, 240, 158, 0.5) 36%,
                rgba(255, 242, 173, 0.2) 64%,
                rgba(255, 255, 255, 0.1) 100%);
    }

    100% {
        background: radial-gradient(ellipse at center,
                gold 0%, rgba(255, 240, 158, 0.5) 34%,
                rgba(255, 242, 173, 0.2) 66%,
                rgba(255, 255, 255, 0.1) 100%);
    }
}

.leaf {
    position: absolute;
    left: 50%;
    top: 3%;
    margin-left: -30px;
    background-color: rgba(14, 110, 14);
    width: 60px;
    height: 60px;
    border-radius: 0 10px 35px 10px;
    transform: rotate(45deg);
    box-shadow: 2px 7px 2px rgba(43, 43, 43, 0.2);
}

.edge {
    position: absolute;
    left: 0;
    bottom: 0;
    background-color: rgba(14, 110, 14);
    width: 25px;
    height: 30px;
    border-radius: 0 10px 35px 10px;
    transform: translateY(50%) translateX(0);
}

.edge.right {
    position: absolute;
    left: unset;
    bottom: unset;
    top: 0;
    right: 0;
    background-color: rgba(14, 110, 14);
    width: 25px;
    height: 30px;
    border-radius: 0 10px 35px 10px;
    transform: translateY(0) translateX(50%);
}

/* 双数修改背景色 */
.leaf:nth-child(even) {
    background-color: #0f880f;
}

.leaf:nth-child(even) .edge {
    background-color: #0f880f;
}

/* 最上面 */
.leaf:nth-child(1) {
    z-index: 100;
    transform: rotate(45deg) scale(0.8);
}

/* 第二层 */
.leaf:nth-child(2) {
    z-index: 99;
    top: 15%;
    transform: rotate(45deg) scale(1.3);
}

.leaf:nth-child(3) {
    z-index: 98;
    top: 28%;
    transform: rotate(45deg) scale(1.6);
}

.leaf:nth-child(4) {
    z-index: 97;
    top: 41%;
    transform: rotate(45deg) scale(1.9);
}

.leaf:nth-child(5) {
    z-index: 96;
    top: 54%;
    transform: rotate(45deg) scale(2.2);
}

.trunk {
    width: 25px;
    height: 45px;
    border-radius: 0 0 3px 3px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 20px;
    z-index: 1;
    box-shadow: 0 0 10px 5px rgb(19, 19, 19);
    background: linear-gradient(0deg, #6d411b 0%, #5a341d 64%);
}

.ball {
    width: 20px;
    height: 20px;
    background: #f00;
    box-shadow: -1px -1px 6px inset #600, 1px 1px 8px inset #ffc9c9;
    border-radius: 50%;
    z-index: 101;
    position: absolute;
}

.b1 {
    left: 25%;
    top: 30%;
}

.b2 {
    left: 35%;
    top: 50%;
}

.b3 {
    left: 65%;
    top: 20%;
}

.b4 {
    left: 45%;
    top: 22%;
}

.b5 {
    left: 40%;
    top: 72%;
}

.b6 {
    left: 65%;
    top: 52%;
}

.b7 {
    left: 50%;
    top: 62%;
}

.b8 {
    left: 80%;
    top: 42%;
}

.b9 {
    left: 10%;
    top: 62%;
}

.b4,
.b5,
.b6 {
    background: #ececec;
    box-shadow: -1px -1px 6px inset #615f5f, 1px 1px 8px inset #fff;
}

.b7,
.b8,
.b9 {
    background: gold;
    box-shadow: -1px -1px 6px inset #3a3101, 1px 1px 8px inset #fff;
}

.sparkle span {
    display: block;
    position: absolute;
    font-size: 20px;
    z-index: 101;
    color: #fff;
    animation: lights 1.5s ease infinite alternate;
}

/* 闪烁动画 */
@keyframes lights {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.5);
    }
}

.sparkle span:nth-child(1) {
    left: 30%;
    top: 40%;
}

.sparkle span:nth-child(2) {
    left: 40%;
    top: 27%;
    font-size: 15px;
}

.sparkle span:nth-child(3) {
    left: 50%;
    top: 57%;
    font-size: 12px;
}

.sparkle span:nth-child(4) {
    left: 70%;
    top: 67%;
    font-size: 14px;
}

.sparkle span:nth-child(5) {
    left: 74%;
    top: 13%;
    font-size: 16px;
}

.blink div {
    width: 3px;
    height: 3px;
    background: #fff;
    z-index: 101;
    position: absolute;
    border-radius: 50%;
    animation: blink 1.5s ease infinite alternate;
}

.blink div:nth-child(2) {
    left: 34%;
    top: 13%;
    transform: scale(1.2);
}

.blink div:nth-child(3) {
    left: 54%;
    top: 43%;
    transform: scale(0.6);
}

.blink div:nth-child(4) {
    left: 64%;
    top: 33%;
    transform: scale(1.4);
}

.blink div:nth-child(5) {
    left: 34%;
    top: 63%;
    transform: scale(1.8);
}

.blink div:nth-child(6) {
    left: 14%;
    top: 76%;
    transform: scale(1.5);
}

@keyframes blink {
    0% {
        box-shadow: 0 0 0 0 #fff;
    }

    25% {
        box-shadow: 0 0 1px 1px #fff;
    }

    50% {
        box-shadow: 0 0 2px 2px #fff;
    }

    75% {
        box-shadow: 0 0 3px 3px #fff;
    }

    100% {
        box-shadow: 0 0 4px 4px #fff;
    }
}